Propshaft Query

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Propshaft Query

Post by philhoward » Thu Aug 22, 2019 9:37 am

I always thought it was a bracing replacement for the one that went under the rear of the sump on the pre-72 cars?

Whether it actually does anything is another matter.


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Propshaft Query

Post by IanC » Thu Aug 22, 2019 9:46 am

Thanks Mark, I'll have a look underneath today.


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Propshaft Query

Post by TrevorG » Thu Aug 22, 2019 9:51 am

It's a belt and brace then!😃

The hole is so you can set the clutch arm length. They probably forgot the slave cylinder was just above it when they designed it's placement.



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Propshaft Query

Post by gtcse8 » Thu Aug 22, 2019 11:51 am

Yes its probably just historic, makes a noise on the gearbox when it gets bent by hitting something OR being used as a jacking point.
The Galved Chassis cars had it and the GB mounting bolted up BEFORE dipping and the bolts are a right pain to remove without heat, ask me how I know :evil:


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Propshaft Query

Post by scimjim » Thu Aug 22, 2019 5:31 pm

gtcse8 wrote:
Thu Aug 22, 2019 11:51 am
The Galved Chassis cars had it and the GB mounting bolted up BEFORE dipping and the bolts are a right pain to remove without heat, ask me how I know :evil:
and the engine cross brace on mine :twisted:


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Propshaft Query

Post by gtcse8 » Thu Aug 22, 2019 6:03 pm

Tell me about that Jim. :evil:
My first 6b has all sorts of bolts and drill tap screws holding it in place. :cry:
The Galve GTC chassis I have just passed on for a rebuild had the spacer washers under the plate and even these were "Galved" to the chassis.
Lucky I have access to a "Gas Axe" to warm them up. :roll:
Also took about a Kilo of Zinc out of the aforementioned bracing tube as only one end had a drain/breather hole.

When I was building trailers for Bradley`s we had ALL our chassis dipped and it took an hour of prep before we shipped them to the dippers. :idea:


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Propshaft Query

Post by IanC » Tue Sep 17, 2019 12:08 pm

I've done all manner of checks and adjustments in line with the above suggestions, with no real progress - apart from finding niggles which needed putting right. Which I have to see as a positive. However, I may have a glimmer of hope on the horizon. While listening on the over run, I had to swerve to avoid one of Lincolnshire's finest pot holes - and the whine changed its note. So there we have it - the noise seems to be coming from the middle/ front , but it's probably a rear wheel bearing. I'm leaning toward this as the front ones are new, and greasing the rears has improved things, but only slightly. Which brings me to a probably quite obscure question. The Alterpart book gives the bearing inner (cone) code as 14130X for a 5 series, and 14130 for the 6s . Does anyone know what the difference is?


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Post by gtcse8 » Tue Sep 17, 2019 6:41 pm

Yes the X suffix means that the bearing has a different shape to normal. :!:

In this bearings case it just means the "Leading edge" Or the side that is pressed onto the shaft has a LARGER radius than standard.

Unknown as to why this is needed, but probably made it easier to set the bearing on the halfshaft when not all workshops had hydraulic presses for replacing worn bearings. :?:


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Propshaft Query

Post by IanC » Tue Sep 17, 2019 7:38 pm

Thanks for that Mark. I looked through the timken interactive catalogue but couldn't find an x suffix example to compare dimensions. So am i right in thinking a 14130 cone fits onto a 5 series half shaft?


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Propshaft Query

Post by gtcse8 » Tue Sep 17, 2019 7:48 pm

Yup Ian
Exactly same bearing, just has a large radius on the "X" type, inner race.


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Propshaft Query

Post by IanC » Tue Sep 17, 2019 8:54 pm

That's great thanks


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Propshaft Query

Post by IanC » Tue Sep 24, 2019 12:38 pm

Well it's not really a propshaft query, more of a half shaft one. I've taken them out in advance of a bearing swap - but the bearings seem to be running smoothly. What is definitely not right is the strange and deep scoring halfway along the left side shaft around part of the circumference. I've had a look up the axle tube and there's nothing immediately visible that I can see that's causing this. Anybody have any ideas?
Update, in the axle tube are some rusty flecks of metal-a bearing breaking up in the diff itself maybe? Just as an aside what's to stop oil (and anything else) travelling from the diff into the axle tube? I can see the oil seal just to the inside of the wheel bearing, but nothing on the diagrams in the area of the diff side gears.
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Propshaft Query

Post by ard126k » Tue Sep 24, 2019 9:40 pm

Somebody's had it in a vice and it slipped?
There's no oil seals outside the diff.
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Propshaft Query

Post by IanC » Wed Sep 25, 2019 7:49 am

Thanks Alex for the suggestion. If the shaft isn't fouling something inside the axle tube (and I don't see how it can be) your explanation would certainly make sense, even if those scratches must have been caused a long time ago.
Thanks also for the point about there being no oil seals on the diff itself, even though i cant see how the oil doesn't find its way out!
I'll change the outer bearings since everything's in bits, but if the noise is still there, it's rebuild time or trying to track down a good used one (ever the optimist!).
Ian


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Propshaft Query

Post by gtcse8 » Wed Sep 25, 2019 8:05 am

Ian there are 5 seals in the axle.
Front pinion/nose X1
Inner bearing housing/end of axle tube X2
Outer bearing housing X2

Any oil travelling into the axle tubes just drains back into the diff casing.
If the oil makes it past the outer tube/bearing seals into the brakes the seals are beyond service and DO need replacing.
Same goes for the pinion seal.
The axle gets quite hot when in use and the oil mist should prevent most rust forming, and the scratches do look very much like vice marks, so could have been done years and years ago.
Just goes to show why using the correct equipment to do a job is essential.
I have seen some very messy steering racks in my time and I have the correct spanners and holders to prevent damages.
I have also got a few rear hubs that have damaged/bent flanges where hammers have been used to remove them.


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